This article I just read says this: 7-keto is 5-AD steroid. This is what the article states
"Another downside to 5-AD is its estrogenic activity. Numerous studies have confirmed that, at physiological levels, 5-AD acts as an estrogen agonist.7,8,9,10 In fact, in light of its dual activity as a mild androgen and estrogen, the accepted scientific name for this compound is now "hermaphrodiol" (from the Latin term meaning "of both sexes").
On the other hand, 4-AD has much less estrogenic activity.11 I'm not saying that taking 5-AD will have you in a training bra; in fact, when taken in moderate dosages, most people probably won't notice its estrogenic action. However, I do know one unfortunate person (myself) who experimented with 5-AD at large dosages (1-2 grams a day). This same unfortunate person was trying to fight off a lingering viral infection by taking advantage of 5-AD's immunostimulating action. As a result, this person ended up with a definite, and quite uncomfortable, swelling and tenderness in both nipples."
I thought 7-keto didn't have these side effects?
Here is the article -
http://t-mag.com/html/27proho.html